Derive the formula for the slope of the tangent line to a parametric curve c(t) = (x(t),
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Derive the formula for the slope of the tangent line to a parametric curve c(t) = (x(t), y(t)) using a method different from that presented in the text. Assume that x'(t0) and y'(t0) exist and x'(t0) ≠ 0. Show that
Then explain why this limit is equal to the slope dy/dx. Draw a diagram showing that the ratio in the limit is the slope of a secant line.
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